I really like the way you’ve put this together. The only changes I would seek to make is that each of your 4 project areas have a different look to the way you’ve organized the presentation. It would be nice if it were consistent. I noticed this particularly in the Persona area. I also wonder if your portfolio can be made so that when you click on an image of a wireframe sketch that it opens up in a lightbox at a larger size so that you can see the details more clearly.
On some of the sketches the photograph itself has a orange tint to it, this is because the color balance is off. This is pretty easy to fix and I’d see if I can get the whites to actually look white in those images. It’s just a distraction and you don’t need a reviewer to be focusing on details like that and losing the big picture!